What happen with the conservation laws when we locally refine grids in adaptive meshes?

More Aamir Sultan's questions See All

Use of artificial intelligence and machine algorithims to revolutionize the field of fluid dynamics?

Hello Everyone ! I have been having this question in mind for quite a long time that we have this huge amount of data available in the form of wind tunnel experiments , in-flight data and...

31 December 2019 2,047 8 View

What is the size of laminar-turbulent transitional regime in terms of spatial and temporal dimensions ?

Hello Everyone , I was wondering is there any literature available on the extent of transitional regime in space and that for how long does it last ? Regards Aamir Sultan

31 December 2019 1,245 3 View

Why pressure far-field require a domain as far as 20 times of the characteristic length ?

Hello Everyone , Pressure far-field boundary condition is often recommended for flows with varying density , but why does it require so larger outer domains. Regards Aamir Sultan

31 December 2019 3,084 3 View

Why does Spalart Allmaras turbulence model underpredicts the Separation of Flow ?

Hello Everyone ! It is alway said that SA model is apporopriate for adverse pressure gradients then how come it lacks the ability to accurately predict separation ?

11 December 2019 354 2 View

Is Spalart Allmaras turbulence model capable of simulating Laminar Separtion Bubbles ?

Hello Everyone I am simulating an airfoil at Low Reynolds Number flow Regime Re=10^5 , in this particular case a laminar boundary layer separates , forming a laminar separation bubble , then...

11 December 2019 3,727 3 View

Which length is used as the reference length while doing external aerodynamic CFD simulation of a full aircraft ?

Hello Everyone , Hope you are doing fine . I have this question about the reference values , that which length should one use while doing external aerodynamic CFD simulation of a full aircraft...

10 November 2019 5,185 4 View

Ineffectiveness of Spalart-Allmaras model on a flat plate wing at Low Re No of 10e5 as the aspect ratio of wing increases ?

Hello Everyone , Hope you are doing fine . I was going through this paper of P. Cosyn and J. Vierendeels on ''Numerical Investigation of Low-Aspect-Ratio Wings at Low Reynolds Numbers'' in which...

08 September 2019 1,461 2 View

For a Mach No of 0.02 pressure based solver is diverging?

Hello Everyone , I am doing a 3D simulation of a 3D wing at a Reynold's number of 10^5 and a mach number of 0.02 . When I use pressure based solver my solution diverges within few iterations ....

02 March 2019 5,366 2 View

Udf to rotate a 3D wing to a certain roll angle for a specified period of time ?

Hello Everyone , Hope you are doing well. I have to rotate a 3D wing at different roll angles with the help of udf in Ansys fluent. Can someone provide me literature regarding this . Regards...

01 February 2019 6,374 2 View

How can I change the axis of rotation in UDF to x-axis from default setting i,e z-axis?

Hello Everyone ; Hope you are doing great . I have to change the axis of rotation from default setting i,e z-axis to x-axis in the given UDF ? How can I do that ?...

01 February 2019 9,372 4 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Filippo Maria Denaro

If you properly adopt a FV formulation, the property of the unique numerical flux allow to fulfill conservation of the estensive variables. But you need to properly construct the flux on the refined grids.

Paolo Lampitella

If the new grid fully and exactly overlaps the old one, you can intersect the two and make a 1 to 1 mapping of the conserved avariables followed by a volume average on the new grid.